package com.gopay.scheduler.common;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

/**
 * @ClassUtil.java
 * @author fanghw
 * @2015年7月23日 上午9:43:38  www.gopay.com.cn Inc.All rights reserved.
 */
public class ClassUtil {
    public static List<Class> getClassesByPackageName(String packageName,boolean isRecursive) throws IOException, ClassNotFoundException {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        String path = packageName.replace('.', '/');
        Enumeration<URL> resources = classLoader.getResources(path);
        List<File> dirs = new ArrayList<File>();
        while (resources.hasMoreElements()) {
            URL resource = resources.nextElement();
            dirs.add(new File(resource.getFile()));
        }
        ArrayList<Class> classes = new ArrayList<Class>();
        for (File directory : dirs) {
            classes.addAll(findClasses(directory, packageName,isRecursive));
        }
        return classes;
    }

    public static List<Class> findClasses(File directory, String packageName,boolean isRecursive) throws ClassNotFoundException {
        List<Class> classes = new ArrayList<Class>();
        if (!directory.exists()) {
            return classes;
        }
        File[] files = directory.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                if(isRecursive){
                    // 递归查找文件夹【即对应的包】下面的所有文件
                    assert !file.getName().contains(".");
                    classes.addAll(findClasses(file, packageName + '.' + file.getName(),isRecursive));
                }                
            } else if (file.getName().endsWith(".class")) {
                classes.add(Class.forName(packageName + "." + file.getName().substring(0, file.getName().length() - 6)));
            }
        }
        return classes;
    }
}
